Rhodonite

Physical Properties

Hardness: 5.5-6.5 on Mohs scale; Color: Pink, rose-red, or brownish-red, typically with black manganese oxide inclusions; Luster: Vitreous to pearly; Crystal structure: Triclinic; Cleavage: Perfect in two directions.

Formation & Geological History

Formed in manganese-rich metamorphic rocks or hydrothermal deposits. Often associated with manganese ores and result from the metamorphism of sedimentary manganese carbonate minerals.

Uses & Applications

Primarily used as a decorative stone, in jewelry (cabochons and beads), and for ornamental carvings. Occasionally used as a minor manganese ore.

Geological Facts

The name is derived from the Greek word 'rhodos' meaning rose. It was designated as the official state gemstone of Massachusetts in 1979. The black veins are caused by the oxidation of manganese.

Field Identification & Locations

Identifiable by its distinct pink color paired with black dendritic or mottled patterns (manganese oxides). Commonly found in Russia, Sweden, Australia, Brazil, and the USA. Collectors look for high color saturation and contrast.

Identified on: 5/9/2026

Mode: Standard